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Car backfires between shifts!

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Old Mar 31, 2010 | 01:23 PM
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Default Car backfires between shifts!
So I replaced my o2 sensors and fuel filter about 2 months ago and my car was running like a champ, now it hesitatates between shifts (A4). Im getting lousy gas mileage and from 3 -4 gear it backfires loud!!!!! I cleaned the maf just now and added some seafoam to my tank. Oh and Im not showing SES light. Any suggestions?
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Old Mar 31, 2010 | 03:16 PM
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How is your basic tune up?
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Old Mar 31, 2010 | 04:56 PM
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Check all the basics. . . Fuel pressure, connections and compression.
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Old Apr 1, 2010 | 11:06 AM
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Spark plugs are about a year old, new fuel filter , air filter, car was seafomed yesterday. Havent checked the fuel presurre yet but it did started hapeninig more or less after I replaced my fuel filter.
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Old Apr 1, 2010 | 11:56 AM
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I would check the rest, doesn't sound like a very difficult issue to find.
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Old Apr 1, 2010 | 11:58 AM
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Most fuel additives are not really a resolution try to stick with locating a mechanical issue
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Old Apr 3, 2010 | 05:18 PM
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Check the EGR out....have you lost top end or are extremely sluggish on accelleration?
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Old Apr 3, 2010 | 07:10 PM
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Replace the spark plugs.
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Old Apr 4, 2010 | 08:24 PM
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Maybe its a exhaust leak on the headers or catback
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